超高层建筑横风向荷载反演分析

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振动与冲击 ›› 2015, Vol. 34 ›› Issue (22) : 35-41.

论文

超高层建筑横风向荷载反演分析

方明新1 ,杨志勇1 ,郅伦海1

作者信息 +

Inverse analysis of across-wind loads on super tall buildings

FANG Ming-xin1 ,YANG Zhi-yong1 ,ZHI Lun-hai1

Author information +

文章历史 +

摘要

提出一种利用风致响应识别结构横风向风荷载的反分析方法。该方法基于卡尔曼滤波理论和正交分解技术（POD）,利用有限测试楼层的风致响应可以识别结构动态风荷载。结合工程实例，对方形超高层建筑进行了风荷载反演分析，并与风洞试验结果开展了对比研究，验证了该方法的适用性及准确性。结果表明估计的风荷载时程及功率谱与试验结果符合较好，多种噪声水平下的反演结果基本满足实际工程需要。研究结果为超高层建筑抗风设计及相关研究提供有用的资料及依据。

Abstract

An effective inverse method is developed to estimate across-wind loads applied on a structure using wind-induced responses. The Kalman filter and proper orthogonal decomposition (POD) technique are utilized for the inverse identification from limited measured responses. The inverse method is applied to wind loads estimation of a square shaped super tall building. The across-wind loads acting on the super tall building were estimated and compared with those determined by a wind tunnel test. The feasibility and accuracy of the method were examined. The results show that the time history and power spectra of across-wind loads obtained in the present research match wind tunnel test. The accuracy of the estimated wind loads at different noise levels is acceptable in engineering practices. The presented results in this paper should be valuable for the design of super-tall buildings under wind storm or typhoon actions.

导出引用

方明新1,杨志勇1,郅伦海1. 超高层建筑横风向荷载反演分析[J]. 振动与冲击, 2015, 34(22): 35-41

FANG Ming-xin1,YANG Zhi-yong1,ZHI Lun-hai1. Inverse analysis of across-wind loads on super tall buildings[J]. Journal of Vibration and Shock, 2015, 34(22): 35-41

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